Beam-head brake for looms



March 17, 1931. w, J OQTHQUT 1,796,647

BEAM HEAD BRAKE FOR LOOMS v Filed Jan. 2, 1950 INVENTOR WM BY z r roms Patented Mar. 17, 1931 PATENT OFFICE WILLIAM J. OOTHOU'I, OF QUEENS VILLAGE, NEW YORK BEAM-HEAD BRAKE FOR LOOMS Application filed January 2, 1930. Serial No. 418,035.

This invention relates to a novel and improved beam head brake for looms, the novel features of which will be best understood these threads being. taken olf from the beam,

as is well-known in the art, and carried past a position in which the Woof threads are woven between the warp threads. It is essential that the warp threads be taken off at a uniform speed, because if they are not, then the woof threads will be unevenly spaced, giving what is called a barr effect.

It has been customary to provide the beam with heads having friction brakes. The brake may take the form of a rope wound around the beam head and held in position at one end as by an anchor weight, and at the other end by a weight or lever which may be used for increasing or decreasing the braking effect. When dirt, grease, or the like, gets on the braking element, such as'the rope referred to above, the result is that the braking element will stick and thus cause an intermittent let-off of the warp threads, With the resulting barre effect in the finished cloth. j

The above defect I have overcome by the invention forming the subject matter of this application. I have shown the beam head 1 as provided with a cylindrical surface 2, about which is coiled a rope 3 in a plurality of turns, this rope supporting at onelend a weight 4 and having its other end attached to a lever 5, which may be adjusted to give the desired braking effect. While I have shown the well-known rope as forming the brakingelement, it is to be understood'that this is merely illustrative, as my invention is not necessarily limited to the use of a rope. The head, of course, is provided with the usual flanges 6, to retain the braking element in position on the cylindrical surface, and the head is of course mounted on the 5 shaft 7 of the beam.

According to my invention, I dispose within the head a container 8, here shown as a basket of wire cloth, or other reticulated material, the mesh of which is small enough to hold a fine powder, such as chalk or talcum, and to permit the powder to sift slowly through the material.

. In the illustrated embodiment, this basket 1s secured to a plate 9 as by spacers 10 ex tending from the plate to the bottom of the basket, so that the plate 9 in effect forms one side of the basket. Screws 11 may be used to fasten the bottom of the basket to the spacers, and of course the plate 9 may be secured to the head as by screws or bolts, not shown. It will also be seen that the Wall 12 of the container or basket is substantially cylindrical in form and disposed substantially parallel to the cylindrical surface 2 and spaced therefrom, as plainly shown in Figs. 1 and 2. The result is that as the beam rotates against the friction of the braking element 2, a supply of powder, which is indicated at 13 in Fig. 2, will be so continually agitated sufficiently to cause it to fallthrough the interstices of the container and drop to the interior of the wall of the beam, whose outer surface forms the braking surface 2. This wall is provided so with a plurality of slits 14; forming recesses in the outer surface of the wall, preferabl inclined at about 45 to the axis of the sha t 7, and alternate slits are inclined oppositely to each other. Each slit has its walls joined on to the braking surface 2, by means of a flaring mouth 15.

By the above arrangement, powderdropping from the container will pass through one or more of the slits and will spread out along the braking surface 2 lengthwise of the braking element 3, and will also spread out transversely of the slits, thus materially increasing the surface of the braking ele ment towhich the powder is applied. The

powder will work in between the braking surface and the braking element, and will maintain an even contact between these two members, so as to insure a uniform let-off of the threads on the beam. At the same time, the use of the flaring mouths avoids the formation of any sharp corners between the walls of the slits and the braking surface of the head. Such corners might damage the braking element or at least roughen it, which would of course beobjection'able. Moreover, by having the slits alternately inclined in opposite directions, as shown,I avoid any tendency to throw the braking element towards one side of the surface 2',

which tendencymightoccur if the slits allextended parallel to each other.

,"lhe. container should have interstices of.

such a size as to permit the powder 13 to passtherethrough at a rate suiiicient to keep the proper smooth contact between thebraking surface and the braking element. Of course, the size of these interstices will accordingly depend somewhatupon the, material which is used, although for chalk or talcum powder I have found that a fiftymesh wire screen is a suitable material for the container.

I. claim:-

beam head for a face engaged by a braking element, a container-Ion said head adapted to hold a powder, .and means to discharge said powder fromthe head onto said surface in contact with, said element,

AIbeamhead for a loom having a surface engaged by a braking element, a container disposed inside said headand adapted to -hold a powder and to discharge said powder, through slits in said surface, in contact with said element. 7 I

8. Agbeam head for a loom having a cylindricalwall with its outer face forming a. braking surface, an elongated braking element extending lengthwise about said surface, a container within said head and adapted to a discharge powder through slits in said wall, said slits beinginclined to the length; of'said element.

ALA beam head for a, loom having a cylindrical wall with itsouter face forming a braking surface, an elongated braking cylindrical wall with its outer face forming element extending lengthwise about said surface, acontainer within said head and adapted to-discharge powder through slits in said wall, the alternateslits being inclined opposite directions to the length of-saijd element. Y i

5. A'beam head for a loom having a afbralr'ing surface, an elongated braking element; extending lengthwise about said f surface, a container within said head and adapted to discharge powder through slits loom having a sur-- in said wall, said slits being joined to said included tothe length of said element.

7. A beam head for a loom having a cylindrical wallwith its outer face forming a braking surface, an elongated braking element. extending lengthwise about said surface, a container within said head and adapted to discharge powder through slits in said'wall, said slits being joined to said surface by flaring mouths, alternate slits being inclined in Opposite directions with respect to the length of said element.

8. A beam head for a loom having a cylindrical wall with its outersurface forming abraking surface, a braking element contacting with said surface, said wall having a plurality of slits through which powder may pass from the insideof said head to said surface, and a container within said head having a wall of reticulated material adapted to discharge powderto' said slits.

9. A beam head for a loom h aving a cylindrical wall with its outer surface forming a braking surface, a braking. element contacting with said surface, said wall having a plurality of slits through whichpowder may pass from the inside of said head to said surface, and a containerwithin said head having a cylindrical wall of reticulated material parallel to but spaced from said braking surface and adapted to discharge powder to said slits as the beam head rotates. 10. A beam head for a. loom having a cylindrical wall with its outer surfaceforming a braking surface, said head having a space within said wall, a circular plate closing said space within the wall and secured to the wall, a container within said wall having a cylindrical wall of reticulated materialfparallel to but spaced from the wall ofthe beam head, means securing said container to said element with the plate forming one wall of the container, and a plurality of slits in the cylindrical wall of a surface engaged by a braking element, said surface having therein one or more open recesses, and apowder disposed within said recesses. 7

12.-A beam head for a loom having a surface engaged by an elongated braking element, said surface having therein one or more open recesses, and a powder disposed in said recesses, said recesses having flaring mouths.

13. A beam head for a loom having a surface engaged by an elongated braking element, said surface having therein one or more open recesses, and a powder disposed in said reccesses, said recesses being inclined to the length of said element.

14. A beam head for a loom having a surface engaged by an elongated braking element, said surface having therein one or more open recesses, and a powder disposed in said recesses, said recesses being inclined to the length of said element, and having flaring mouths.

WILLIAM J. OOTHOUT, 

